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Rainier Arms AR-15 UltraMatch Billet Upper & Ambi Lower Combo Set - MOD 3

AR-15 Receiver Set

In stock

Also Available for In-Store Purchase Auburn, WA

Ships from Distribution Facility

FFL Required Before Shipping.

Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.


Rainier Arms UltraMatch Billet Upper and Lower Combo Set MOD 3

Our billet sets are CNC machined from solid billet 7075-T6 aluminum which is 70% stronger than the commonly used 6061 aluminum and finished with milspec hardcoat anodize to a surface hardness of 60 Rockwell. We have designed our lowers with an ambidextrous magazine release and bolt release with extended latch for smoother deployment. The precision machining on our billets are well known in the industry and we are excited to introduce our combo sets for your next rifle build.


  • Ambidextrous Extended Bolt Release
  • Ambidextrous Magazine Release
  • M4 Feed Ramps
  • 7075 Billet Aluminum
  • Flared Magwell
  • Integrated Trigger Guard
  • Tensioning Screw for proper Upper/Lower Fit
  • Weight: 1 lb 0.6 oz
More Information
Product Type AR-15 Receiver Set
Manufacturer Rainier Arms, LLC
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